cross-sectional applying them to a questionnaire that included social-demographic variables and questions with respect to the correct application of the herself exploration technique as well as questions about the practice, personal opinion of the same one and with base to the NOM-041-SSA2-2011; ...
墨西哥卫生部批准并在其官方公报上公布了墨西哥官方标准NOM-252-SSA1-2011的修订案《环境卫生,玩具和学校用品,生物有效性,重金属限制,化学物质指标及测试方法》。此项修订案已经开始生效。NOM-252-SSA1-2011第1.2.3.1点在草案中进行了如下修改: 供学前教育使用的学校用品(铅笔除外),意图出口的玩具及其零部件(在临时...